SIT9120AI-2D-XXS

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Programmable Oscillators are designed to produce a certain frequency output, often with rapid adjustable capabilities, either through varying the voltage being supplied or through programming of the chip itself. In some specialized cases, they may even be used as signal generators with signal shapes controllable by a separate chip or circuit. SIT9120AI-2D-XXS is one example of programmable oscillators. It is designed to provide the high-stability clock signals that are essential in today’s electronic systems.

Application Field: This oscillator is suitable for use in a wide variety of applications, from triggering of microcontrollers to actuation of precision hardened motors. Those applications that regularly require a stable high frequency clock signal may find its features particularly beneficial. Another area in which this device brings significant benefits is in data communication. As its output can be quickly adapted, SIT9120AI-2D-XXS is a great choice for applications that require a rapidly changing data rate.

Working Principle: This oscillator is based on a quartz crystal, which is the most stable type of oscillator known. The crystal vibrates at its well-defined resonant frequency as electric current is passed through it. This frequency is degraded by a tiny amount due to factors such as temperature changes and aging, but this degradation is insignificant enough to make quartz an excellent choice for timing tasks. In order to make quartz oscillators programmable, a special circuit called a phase-locked loop circuit is incorporated. This circuit, by comparison with a reference oscillator signal, creates a feedback loop that causes the quartz oscillator output frequency to follow the reference signal.

The SIT9120AI-2D-XXS programmable oscillator actually consists of two packages; the package itself, which contains the quartz crystal, and the PLL circuit. This device requires two inputs, the reference and the programmable control. The reference signal is used to calibrate the output frequency of the crystal. The reference signal also provides an accurate reference for the feedback loop. The control signal determines the parameters, such as frequency and amplitude, that will be used by the oscillator, and can also be used to switch between different frequencies.

In the end, the oscillator output is a clean and stable signal that is not affected by the temperature or other environmental conditions. This ensures that the signal is always consistent, allowing it to be reliably used in a variety of applications. As the signal is designed to follow the reference signal, it can be used to rapidly and accurately switch between different frequencies as needed.

The SIT9120AI-2D-XXS is a very versatile device, as it has the ability to adjust its output frequency and amplitude, as well as being able to operate in either an open-loop or closed-loop mode. Further, the frequency can be quickly switched between different settings without leaving the device in a standby state. All of these capabilities make this device an excellent choice when a high-quality oscillator is needed, particularly when rapid adjustments are required.

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